What Does Red Light Do for Plants? A Grower's Guide
Red light in the 620–700 nm range drives photosynthesis and triggers the transition from vegetative growth to flowering by activating the phytochrome system. Increasing the red-to-blue ratio to 3:1 or 4:1 during the flowering stage maximizes biomass accumulation and bud density. Using adjustable-spectrum LED fixtures to shift toward these red-dominant settings optimizes overall yield.
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